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AP65455 (Obsolete)

Inactive Datasheet Archive

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Description

The AP65455 is an adaptive constant on-time mode synchronous buck converter providing high efficiency, excellent transient response and high DC output accuracy for low-voltage regulation in digital TV and monitor. The constant-on-time control scheme handles wide input/output voltage ratios and provides low external component count. The internal proprietary circuit enables the device to adopt both low equivalent series resistance (ESR) output capacitors, such as SP-CAP or POSCAP and ultra-low ESR ceramic capacitors. The AP65455 features programmable soft-start, UVLO, OTP, high voltage tolerance EN pin, Power Good and OCP to protect the circuit. This IC is available in DFN3030-10 package.

Feature(s)

Fixed Frequency Emulated Constant On-time Control
Good Stability Independent of the Output Capacitor ESR
Fast Load Transient Response
Synchronous Rectification: 90mΩ Internal High-side Switch and 57mΩ Internal Low-side Switch
Wide Input Voltage Range: 4.5V to 18V
Output Voltage Range: 0.76V to 6V
4A Continuous Output Current
650kHz Switching Frequency
Built-in Over Current Limit
Support Power Good Pin
High Voltage Tolerance EN pin
Built-in Thermal Shutdown Protection
Programmable Soft-start
Pre-biased Start-up

Application(s)

Point of Load power

Product Specifications

Product Parameters

Efficiency (%)	94
Frequency Typ (Hz)	650
HS RDS(ON) (mΩ)	90
LS RDS(ON) (mΩ)	57
MaximumInput Voltage (V)	N/A
MinimumInput Voltage (V)	4.5
Output Current (mA)	N/A
Output Voltage (V)	0.76 to 6
Quiescent Current Typ (mA)	0.6
Shutdown Current Typ (µA)	1
Type	Buck

Technical Documents

Recommended Soldering Techniques

TN1.pdf